package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    AttrAttrgroupRelationDao relationDao;

    @Autowired
    AttrGroupDao attrGroupDao;

    @Autowired
    CategoryDao categoryDao;

    @Autowired
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();  // 这是一个PO，来对应数据库的

        // 传统做法是将页面提交过来的额数据 AttrVo 通过get()获取一个个对应到 AttrEntity 对象中，然后再保存
        // attrEntity.setAttrName(attr.getAttrName());

        // 新做法，可以使用springbeans提供的属性复制方法，将一个对象属性复制到另一个对象中,提前是Vo和PO的属性名必须是一一对应的
        BeanUtils.copyProperties(attr, attrEntity);

        // 1、保存基本对象
        this.save(attrEntity);

        // 2.保存关联关系
      if(attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId()!=null){
        AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
        relationEntity.setAttrGroupId(attr.getAttrGroupId());
        relationEntity.setAttrId(attrEntity.getAttrId());
        relationDao.insert(relationEntity);
      }

    }

  @Override
  public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
    QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type","base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

    if(catelogId != 0){
      queryWrapper.eq("catelog_id",catelogId);
    }

    String key = (String) params.get("key");
    if(!StringUtils.isEmpty(key)){
      //attr_id  attr_name
      queryWrapper.and((wrapper)->{
        wrapper.eq("attr_id",key).or().like("attr_name",key);
      });
    }

    IPage<AttrEntity> page = this.page(
        new Query<AttrEntity>().getPage(params),
        queryWrapper
    );

    PageUtils pageUtils = new PageUtils(page);
    List<AttrEntity> records = page.getRecords();
    List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
      AttrRespVo attrRespVo = new AttrRespVo();
      BeanUtils.copyProperties(attrEntity, attrRespVo);

      //1、设置分类和分组的名字
      if("base".equalsIgnoreCase(type)){
        AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
        if (attrId != null && attrId.getAttrGroupId()!=null) {
          AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
          attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
        }

      }


      CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
      if (categoryEntity != null) {
        attrRespVo.setCatelogName(categoryEntity.getName());
      }
      return attrRespVo;
    }).collect(Collectors.toList());

    pageUtils.setList(respVos);
    return pageUtils;
  }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
       AttrRespVo respVo = new AttrRespVo();
       AttrEntity attrEntity = this.getById(attrId);
       BeanUtils.copyProperties(attrEntity, respVo);

       if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
           //1、设置分组信息
           AttrAttrgroupRelationEntity attrgroupRelation = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
           if(attrgroupRelation!=null){
               respVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());
               AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelation.getAttrGroupId());
               if(attrGroupEntity!=null){
                   respVo.setGroupName(attrGroupEntity.getAttrGroupName());
               }
           }
       }

        //2、设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        respVo.setCatelogPath(catelogPath);

        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if(categoryEntity!=null){
            respVo.setCatelogName(categoryEntity.getName());
        }


        return respVo;
    }

  @Transactional
  @Override
  public void updateAttr(AttrVo attr) {
    AttrEntity attrEntity = new AttrEntity();
    BeanUtils.copyProperties(attr,attrEntity);
    this.updateById(attrEntity);

    if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
      //1、修改分组关联
      AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();

      relationEntity.setAttrGroupId(attr.getAttrGroupId());
      relationEntity.setAttrId(attr.getAttrId());

      Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
      if(count>0){

        relationDao.update(relationEntity,new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attr.getAttrId()));

      }else{
        relationDao.insert(relationEntity);
      }
    }


  }

  /**
   * 根据分组id查找关联的所有基本属性
   * @param attrgroupId
   * @return
   */
  @Override
  public List<AttrEntity> getRelationAttr(Long attrgroupId) {
    List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));

    List<Long> attrIds = entities.stream().map((attr) -> {
      return attr.getAttrId();
    }).collect(Collectors.toList());

    if(attrIds == null || attrIds.size() == 0){
      return null;
    }
    Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
    return (List<AttrEntity>) attrEntities;
  }

  @Override
  public void deleteRelation(AttrGroupRelationVo[] vos) {
    //relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id",1L));
    //
    List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
      AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
      BeanUtils.copyProperties(item, relationEntity);
      return relationEntity;
    }).collect(Collectors.toList());
    relationDao.deleteBatchRelation(entities);
  }

  /**
   * 获取当前分组没有关联的所有属性
   * @param params
   * @param attrgroupId
   * @return
   */
  @Override
  public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
    //1、当前分组只能关联自己所属的分类里面的所有属性
    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
    Long catelogId = attrGroupEntity.getCatelogId();
    //2、当前分组只能关联别的分组没有引用的属性
    //2.1)、当前分类下的其他分组
    List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
    List<Long> collect = group.stream().map(item -> {
      return item.getAttrGroupId();
    }).collect(Collectors.toList());

    //2.2)、这些分组关联的属性
    List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
    List<Long> attrIds = groupId.stream().map(item -> {
      return item.getAttrId();
    }).collect(Collectors.toList());

    //2.3)、从当前分类的所有属性中移除这些属性；
    QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
    if(attrIds!=null && attrIds.size()>0){
      wrapper.notIn("attr_id", attrIds);
    }
    String key = (String) params.get("key");
    if(!StringUtils.isEmpty(key)){
      wrapper.and((w)->{
        w.eq("attr_id",key).or().like("attr_name",key);
      });
    }
    IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

    PageUtils pageUtils = new PageUtils(page);

    return pageUtils;
  }

  @Override
  public List<Long> selectSearchAttrIds(List<Long> attrIds) {

    // select attr_id from pms_attr where attr_id in (?) and search_type = 1
    return baseMapper.selectSearchAttrIds(attrIds);
  }


}